Kport Direct Access I/O Ports Under Win NT/2000/XP

• Download source files - 51.3 KB
• Download demo project - 101 KB

Introduction

I wrote this DLL for implementing direct access I/O ports in Windows NT/2K/XP.

Background

For compiling the project, you need VC7.1-2003. For compiling kioport.sys, you need to install the DDK. Kioport is based on PortTalk.sys from the article: "Beyond Logic Port Talk I/O Port Driver", http://www.beyondlogic.org/, and "A DDK's project wizard for VC2003", http://www.codeproject.com/KB/macros/ddkwizard.aspx.

Using the code

1. Copy kioport.sys to \windows\system32\drivers.
2. Add kioport.reg to register windows.
3. Reboot windows for activate service in the register of windows.
4. Add kport.h in your project and kport.lib.
5. Put Kport.dll in the same directory as the application.

Using the Kport DLL is so easy. Here is the function definition, and the explanation follows:

// Returns a value from specific ports.
BYTE Inportb(WORD PortNum);
            
// Write a value to specific ports.
void Outportb(WORD PortNum, BYTE byte);

• PortNum: is the port number; for example: 0x378 (LPT1).
• BYTE: data to send for a specific PortNum in Ouportb, and data received in Inportb.

How to use the sample dialog

• Write a number bellow the text 'Write Value( )', and click in the Write button.
• Click on the Read button.

History

• First version: April 3, 2005.